12V系统车灯浪涌防护方案设计

12V系统车灯浪涌防护方案设计图：

从图中的防护方案可以看出，电路中选用了一颗TVS二极管SM8S24A，反应速度快、残压低、共差模防护，满足ISO7637-2 surge specification。SM8S24A是一种高效型的电路保护器件，常用于汽车电子产品之中。汽车级TVS二极管SM8S24A特性：
? Optimized glass passivated chip
? Case: DO-218AB
? TJ = 175 °C capability suitable for high reliability and automotive requirement
? 6600 W peak pulse power capability with a 10/1000 μs waveform, repetitive rate (duty cycle):0.01 %
? Meet ISO 7637-2 5a/5b and ISO 16750 load dump test (varied by test condition)
? AEC-Q101 qualified
? Low leakage current
? Low forward voltage drop
? Very fast response time
? RoHS compliant
? Excellent clamping capability

想了解更多有关汽车车灯浪涌防护方案及电路保护器件选型，欢迎各位前来与东沃沟通交流：136 7581 6901（微信同号）朱工